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88e17b57 | 1 | /* The implementation of class Object for Objective-C. |
748086b7 | 2 | Copyright (C) 1993, 1994, 1995, 1997, 2002, 2009 Free Software Foundation, Inc. |
88e17b57 | 3 | |
6c82ad25 | 4 | This file is part of GCC. |
88e17b57 | 5 | |
6c82ad25 | 6 | GCC is free software; you can redistribute it and/or modify it |
88e17b57 | 7 | under the terms of the GNU General Public License as published by the |
748086b7 | 8 | Free Software Foundation; either version 3, or (at your option) any |
88e17b57 BE |
9 | later version. |
10 | ||
6c82ad25 | 11 | GCC is distributed in the hope that it will be useful, but WITHOUT |
88e17b57 BE |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | License for more details. | |
15 | ||
748086b7 JJ |
16 | Under Section 7 of GPL version 3, you are granted additional |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
88e17b57 | 19 | |
748086b7 JJ |
20 | You should have received a copy of the GNU General Public License and |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
88e17b57 | 24 | |
6dead247 | 25 | #include "objc-private/common.h" |
88e17b57 | 26 | #include <stdarg.h> |
b15b7ef8 | 27 | #include <errno.h> |
88e17b57 BE |
28 | #include "objc/Object.h" |
29 | #include "objc/Protocol.h" | |
30 | #include "objc/objc-api.h" | |
31 | ||
88e17b57 BE |
32 | @implementation Object |
33 | ||
002d4675 NP |
34 | - (Class)class |
35 | { | |
36 | return object_get_class (self); | |
37 | } | |
38 | ||
39 | - (BOOL)isEqual: (id)anObject | |
40 | { | |
41 | return self == anObject; | |
42 | } | |
43 | ||
44 | @end | |
45 | ||
46 | /* The following methods were deprecated in GCC 4.6.0 and will be | |
47 | removed in the next GCC release. */ | |
48 | @implementation Object (Deprecated) | |
49 | ||
88e17b57 BE |
50 | + initialize |
51 | { | |
52 | return self; | |
53 | } | |
54 | ||
55 | - init | |
56 | { | |
57 | return self; | |
58 | } | |
59 | ||
60 | + new | |
61 | { | |
62 | return [[self alloc] init]; | |
63 | } | |
64 | ||
65 | + alloc | |
66 | { | |
67 | return class_create_instance(self); | |
68 | } | |
69 | ||
70 | - free | |
71 | { | |
72 | return object_dispose(self); | |
73 | } | |
74 | ||
75 | - copy | |
76 | { | |
77 | return [[self shallowCopy] deepen]; | |
78 | } | |
79 | ||
80 | - shallowCopy | |
81 | { | |
82 | return object_copy(self); | |
83 | } | |
84 | ||
85 | - deepen | |
86 | { | |
87 | return self; | |
88 | } | |
89 | ||
90 | - deepCopy | |
91 | { | |
92 | return [self copy]; | |
93 | } | |
94 | ||
88e17b57 BE |
95 | - (Class)superClass |
96 | { | |
97 | return object_get_super_class(self); | |
98 | } | |
99 | ||
100 | - (MetaClass)metaClass | |
101 | { | |
102 | return object_get_meta_class(self); | |
103 | } | |
104 | ||
105 | - (const char *)name | |
106 | { | |
107 | return object_get_class_name(self); | |
108 | } | |
109 | ||
110 | - self | |
111 | { | |
112 | return self; | |
113 | } | |
114 | ||
115 | - (unsigned int)hash | |
116 | { | |
117 | return (size_t)self; | |
118 | } | |
119 | ||
c24aadf3 | 120 | - (int)compare:(id)anotherObject; |
88e17b57 BE |
121 | { |
122 | if ([self isEqual:anotherObject]) | |
123 | return 0; | |
124 | // Ordering objects by their address is pretty useless, | |
125 | // so subclasses should override this is some useful way. | |
b15b7ef8 | 126 | else if ((id)self > anotherObject) |
88e17b57 BE |
127 | return 1; |
128 | else | |
129 | return -1; | |
130 | } | |
131 | ||
132 | - (BOOL)isMetaClass | |
133 | { | |
134 | return NO; | |
135 | } | |
136 | ||
137 | - (BOOL)isClass | |
138 | { | |
139 | return object_is_class(self); | |
140 | } | |
141 | ||
142 | - (BOOL)isInstance | |
143 | { | |
144 | return object_is_instance(self); | |
145 | } | |
146 | ||
147 | - (BOOL)isKindOf:(Class)aClassObject | |
148 | { | |
149 | Class class; | |
150 | ||
151 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
152 | if (class==aClassObject) | |
153 | return YES; | |
154 | return NO; | |
155 | } | |
156 | ||
157 | - (BOOL)isMemberOf:(Class)aClassObject | |
158 | { | |
159 | return self->isa==aClassObject; | |
160 | } | |
161 | ||
162 | - (BOOL)isKindOfClassNamed:(const char *)aClassName | |
163 | { | |
164 | Class class; | |
165 | ||
166 | if (aClassName!=NULL) | |
167 | for (class = self->isa; class!=Nil; class = class_get_super_class(class)) | |
168 | if (!strcmp(class_get_class_name(class), aClassName)) | |
169 | return YES; | |
170 | return NO; | |
171 | } | |
172 | ||
173 | - (BOOL)isMemberOfClassNamed:(const char *)aClassName | |
174 | { | |
175 | return ((aClassName!=NULL) | |
176 | &&!strcmp(class_get_class_name(self->isa), aClassName)); | |
177 | } | |
178 | ||
179 | + (BOOL)instancesRespondTo:(SEL)aSel | |
180 | { | |
cf3822f1 | 181 | return class_get_instance_method(self, aSel) != (Method_t)0; |
88e17b57 BE |
182 | } |
183 | ||
184 | - (BOOL)respondsTo:(SEL)aSel | |
185 | { | |
186 | return ((object_is_instance(self) | |
187 | ?class_get_instance_method(self->isa, aSel) | |
cf3822f1 | 188 | :class_get_class_method(self->isa, aSel)) != (Method_t)0); |
88e17b57 BE |
189 | } |
190 | ||
191 | + (IMP)instanceMethodFor:(SEL)aSel | |
192 | { | |
193 | return method_get_imp(class_get_instance_method(self, aSel)); | |
194 | } | |
195 | ||
196 | // Indicates if the receiving class or instance conforms to the given protocol | |
197 | // not usually overridden by subclasses | |
198 | // | |
199 | // Modified 9/5/94 to always search the class object's protocol list, rather | |
200 | // than the meta class. | |
201 | ||
202 | + (BOOL) conformsTo: (Protocol*)aProtocol | |
203 | { | |
8f8c44cb | 204 | size_t i; |
88e17b57 BE |
205 | struct objc_protocol_list* proto_list; |
206 | id parent; | |
207 | ||
208 | for (proto_list = ((Class)self)->protocols; | |
209 | proto_list; proto_list = proto_list->next) | |
210 | { | |
211 | for (i=0; i < proto_list->count; i++) | |
212 | { | |
213 | if ([proto_list->list[i] conformsTo: aProtocol]) | |
214 | return YES; | |
215 | } | |
216 | } | |
217 | ||
218 | if ((parent = [self superClass])) | |
219 | return [parent conformsTo: aProtocol]; | |
220 | else | |
221 | return NO; | |
222 | } | |
223 | ||
224 | - (BOOL) conformsTo: (Protocol*)aProtocol | |
225 | { | |
226 | return [[self class] conformsTo:aProtocol]; | |
227 | } | |
228 | ||
229 | - (IMP)methodFor:(SEL)aSel | |
230 | { | |
231 | return (method_get_imp(object_is_instance(self) | |
232 | ?class_get_instance_method(self->isa, aSel) | |
233 | :class_get_class_method(self->isa, aSel))); | |
234 | } | |
235 | ||
236 | + (struct objc_method_description *)descriptionForInstanceMethod:(SEL)aSel | |
237 | { | |
238 | return ((struct objc_method_description *) | |
239 | class_get_instance_method(self, aSel)); | |
240 | } | |
241 | ||
242 | - (struct objc_method_description *)descriptionForMethod:(SEL)aSel | |
243 | { | |
244 | return ((struct objc_method_description *) | |
245 | (object_is_instance(self) | |
246 | ?class_get_instance_method(self->isa, aSel) | |
247 | :class_get_class_method(self->isa, aSel))); | |
248 | } | |
249 | ||
250 | - perform:(SEL)aSel | |
251 | { | |
252 | IMP msg = objc_msg_lookup(self, aSel); | |
253 | if (!msg) | |
254 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
255 | return (*msg)(self, aSel); | |
256 | } | |
257 | ||
258 | - perform:(SEL)aSel with:anObject | |
259 | { | |
260 | IMP msg = objc_msg_lookup(self, aSel); | |
261 | if (!msg) | |
262 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
263 | return (*msg)(self, aSel, anObject); | |
264 | } | |
265 | ||
266 | - perform:(SEL)aSel with:anObject1 with:anObject2 | |
267 | { | |
268 | IMP msg = objc_msg_lookup(self, aSel); | |
269 | if (!msg) | |
270 | return [self error:"invalid selector passed to %s", sel_get_name(_cmd)]; | |
271 | return (*msg)(self, aSel, anObject1, anObject2); | |
272 | } | |
273 | ||
274 | - (retval_t)forward:(SEL)aSel :(arglist_t)argFrame | |
275 | { | |
b62cc13a | 276 | (void) argFrame; /* UNUSED */ |
88e17b57 BE |
277 | return (retval_t)[self doesNotRecognize: aSel]; |
278 | } | |
279 | ||
280 | - (retval_t)performv:(SEL)aSel :(arglist_t)argFrame | |
281 | { | |
282 | return objc_msg_sendv(self, aSel, argFrame); | |
283 | } | |
284 | ||
285 | + poseAs:(Class)aClassObject | |
286 | { | |
287 | return class_pose_as(self, aClassObject); | |
288 | } | |
289 | ||
290 | - (Class)transmuteClassTo:(Class)aClassObject | |
291 | { | |
292 | if (object_is_instance(self)) | |
293 | if (class_is_class(aClassObject)) | |
294 | if (class_get_instance_size(aClassObject)==class_get_instance_size(isa)) | |
295 | if ([self isKindOf:aClassObject]) | |
296 | { | |
297 | Class old_isa = isa; | |
298 | isa = aClassObject; | |
299 | return old_isa; | |
300 | } | |
301 | return nil; | |
302 | } | |
303 | ||
304 | - subclassResponsibility:(SEL)aSel | |
305 | { | |
306 | return [self error:"subclass should override %s", sel_get_name(aSel)]; | |
307 | } | |
308 | ||
309 | - notImplemented:(SEL)aSel | |
310 | { | |
311 | return [self error:"method %s not implemented", sel_get_name(aSel)]; | |
312 | } | |
313 | ||
314 | - shouldNotImplement:(SEL)aSel | |
315 | { | |
316 | return [self error:"%s should not implement %s", | |
317 | object_get_class_name(self), sel_get_name(aSel)]; | |
318 | } | |
319 | ||
320 | - doesNotRecognize:(SEL)aSel | |
321 | { | |
322 | return [self error:"%s does not recognize %s", | |
323 | object_get_class_name(self), sel_get_name(aSel)]; | |
324 | } | |
325 | ||
88e17b57 BE |
326 | - error:(const char *)aString, ... |
327 | { | |
328 | #define FMT "error: %s (%s)\n%s\n" | |
329 | char fmt[(strlen((char*)FMT)+strlen((char*)object_get_class_name(self)) | |
330 | +((aString!=NULL)?strlen((char*)aString):0)+8)]; | |
331 | va_list ap; | |
332 | ||
333 | sprintf(fmt, FMT, object_get_class_name(self), | |
334 | object_is_instance(self)?"instance":"class", | |
335 | (aString!=NULL)?aString:""); | |
336 | va_start(ap, aString); | |
337 | objc_verror(self, OBJC_ERR_UNKNOWN, fmt, ap); | |
338 | va_end(ap); | |
339 | return nil; | |
340 | #undef FMT | |
341 | } | |
342 | ||
343 | + (int)version | |
344 | { | |
345 | return class_get_version(self); | |
346 | } | |
347 | ||
348 | + setVersion:(int)aVersion | |
349 | { | |
350 | class_set_version(self, aVersion); | |
351 | return self; | |
352 | } | |
353 | ||
354 | + (int)streamVersion: (TypedStream*)aStream | |
355 | { | |
356 | if (aStream->mode == OBJC_READONLY) | |
357 | return objc_get_stream_class_version (aStream, self); | |
358 | else | |
359 | return class_get_version (self); | |
360 | } | |
361 | ||
362 | // These are used to write or read the instance variables | |
363 | // declared in this particular part of the object. Subclasses | |
364 | // should extend these, by calling [super read/write: aStream] | |
365 | // before doing their own archiving. These methods are private, in | |
366 | // the sense that they should only be called from subclasses. | |
367 | ||
368 | - read: (TypedStream*)aStream | |
369 | { | |
b62cc13a | 370 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
371 | // [super read: aStream]; |
372 | return self; | |
373 | } | |
374 | ||
375 | - write: (TypedStream*)aStream | |
376 | { | |
b62cc13a | 377 | (void) aStream; /* UNUSED */ |
88e17b57 BE |
378 | // [super write: aStream]; |
379 | return self; | |
380 | } | |
381 | ||
382 | - awake | |
383 | { | |
384 | // [super awake]; | |
385 | return self; | |
386 | } | |
387 | ||
388 | @end |